bug#34138: 27.0.50; Delayed display of PDF file images

[Eli Zaretskii]

> From: Stephen Berman <stephen.berman@gmx.net>
> Cc: Eli Zaretskii <eliz@gnu.org>,  rudalics@gmx.at,  34138@debbugs.gnu.org,  
> tsdh@gnu.org
> Date: Mon, 21 Jan 2019 21:33:25 +0100
> 
> > Note, that I don't see a delay. Rather nothing seems to happen until I
> > trigger a redisplay, for example via M-x.
> 
> How long do you wait?  On my machine, which is slow, it seems to take at
> least 30-45 seconds or even longer, depending on the size of the file,
> but eventually the image does appear without keyboard input.

That could be due to an unrelated event that happens only on your
system.  Like some X event or D-Bus or whatever.